Why do dolphins come to the surface of the water

Asked by admin @ 06/08/2021 in Science viewed by 288 People

Why do dolphins come to the surface of water to breathe? class 3rd

Answered by admin @ 06/08/2021

Dolphins are marine mammals and just like land dwelling mammals, they require air to breathe. Unlike fish, which are non-mammalian animals, dolphins do not possess gills so they must come to the surface of the water to breathe.

How much percentage of earth surface is covered by water

Asked by admin @ 02/12/2021 in Geography viewed by 396 persons

1. What percent of the Earth’s surface is covered by oceans? How did you calculate this percentage?

A layer of oil floating on the surface of water

Asked by admin @ 05/11/2021 in Physics viewed by 314 persons

A 120-cm-thick layer of oil floats on a 140-cm-thick layer of water. What is the pressure at the bottom of the water layer?

Why does water roll off the surface of a leaf

Asked by admin @ 04/10/2021 in Biology viewed by 295 persons

Why does water roll off the surface of a leaf? A. Because water is attracted to nonpolar molecules B. Because water is a nonpolar molecule C. Because plants do not …

How much of earth's surface water exists in the oceans

Asked by admin @ 02/10/2021 in Geography viewed by 314 persons

How much of earth's surface water exists in the oceans? how much of earth's surface water exists in the oceans? one-quarter of earth's surface water exists in the oceans. half …

Ice floats on the surface of water because

Asked by admin @ 29/08/2021 in Science viewed by 312 persons

Ice floats on surface of water because?

The surface runoff is the quantity of water

Asked by admin @ 25/08/2021 in Science viewed by 305 persons

The surface run off is the quantity of water a.absorbe by soilb.intercepted by building and vegetativec.required to full surface depressionsd.that reaches the stream channels.

How much of the earth's surface _____ by water

Asked by admin @ 23/08/2021 in English viewed by 328 persons

Water _____(cover) most of the Earth's surface. chose correct answer

The speed of ripples on the surface of water

Asked by admin @ 17/08/2021 in Physics viewed by 265 persons

The speed v of ripples on surface of water depends on surface tension

The surface of still water is considered to be

Asked by admin @ 16/08/2021 in Environmental Sciences viewed by 324 persons

The water surface of a still pond represents a - surface

What protects the surface of a plant from water loss

Asked by admin @ 04/08/2021 in Biology viewed by 283 persons

What protects the surface of a plant from water loss?

What do you call all the water on earth's surface

Asked by admin @ 02/08/2021 in Science viewed by 318 persons

What do you call all water on earths surface

What fraction of the earth's surface is covered in water

Asked by admin @ 02/08/2021 in Science viewed by 297 persons

What fraction of earths surface is covered in water

Which property cohesion or adhesion causes surface tension in water

Asked by admin @ 26/11/2021 in Biology viewed by 283 persons

What do water's properties of cohesion, surface tension, and adhesion have in common? 1) All have to do with the ionic bonds between water's atoms. 2) All result from the …

How much weight can the surface tension of water hold

Asked by admin @ 09/11/2021 in Physics viewed by 294 persons

The surface tension of water was determined in a laboratory by using the drop weight method. 100 drops were released from a burette the inner diameter of whose opening is …

Water has a high surface tension what does this mean

Asked by admin @ 05/11/2021 in Biology viewed by 272 persons

8. Which feature of water explains why water has a high surface tension? A. water is the universal solvent and dissolves other molecules B. water is a thermal mediator and …